Material Author

stone, wood and glass in one HTML file

You draw where the lines go. The stone happens.

It runs entirely in your browser — no install, no account, no upload. The slab is the document: a .json file that renders to the same picture every time, at any size from a thumbnail to 262,144 pixels wide.

• Veins, branches, webs, stylolites, breccia, drusy, granite speck fields — each one a mark you place, not a preset you pick.
• A coat tier over the top: subsurface glow, specular, one movable light, and a lens that refracts.
• Black light and any other spectrum, with per-layer emission — the same slab under a different lamp.
• Three materials behind one fork: stone, where the marks are the face; wood, a plane through a 3D growth-ring field, so one authored tree yields every board; and glass.
• Cut the slab into a floor — 13 patterns with real grout, kerf and edge finish, laid in order, off the stack or shuffled, at sizes measured in inches on an 8 × 5 ft slab.
• Exports the picture, the coverage masks, vein id and t maps, an .ora with a layer per authoring layer, the vectors as SVG, and the slab itself.

Past 16,384 pixels the export renders a grid of tiles straight into a tiled BigTIFF, so the whole picture never exists at once and a lost tile costs one tile rather than the render. The largest made: 262,144 × 163,840 — 42.95 gigapixels, 4.26 GB — written in a browser tab in 95 minutes from a 111 KB slab. At the slab's real size of 8 × 5 ft that is 2,731 DPI, about nine times what the eye resolves. It stops there by decision rather than by limit: opening one costs 443 GB of working space. A PNG streams in bands instead and caps at 65,535 wide — which is where the reproducible figure comes from: 65,535 × 40,959, rendered twice to identical bytes, and produced on five machines from a 2 GB tablet upward.